Improvement in filter-racks



UNITED STATES PATENT OEETcEo BYRON FENNER, OF WESTFIELD, YORK.

lMlROVEMENT lN FILTER-RACKS.

Specification forming part of Letters Patent No. 189,929, dated April24, 1877; application iile March 12, 1877.

To all whom it may concern Be it known that I, BYRON FENNER, ofWestfield, in the county of Chautauqua, and State of New York, haveinvented a new and Improved Filter-Rack, of which the following is aspeciiication:

The accompanying drawing shows a side elevation of my improvedlter-rack.-

This filter-rack is intended to support the filtering paper in funnelsof any angle or. height, keeping the paper entirely ,from the sides ofthe funnel, and allowing the passage of air at the sides, and a morerapid and perfect filtration. The rack is secured to the top and bottomof funnel, to admit the pouring out of liquids from the same; and, as itis made of only two pieces, maybe easily cleaned, is handier in use, andcheaper in manufacture, than the present upright wire-racks.

The invention consists of a filter-rack made of a spirally-coiled wire,attached by top hook and jointed center link with lower hook to the topand bottom of funnel.

In the drawing, A represents the spiral main part of my improvedfilter-rack, and B a swinging link that is appliedto the center of partA.

The main part A is made of a piece of spirally-wound spring-wire, whichis attached by a hook or other fastening device, a, to the upper edge ofthe funnel, and by a hook, b, at the lower end of the jointed link tothe bot tom edge of the neck of the funnel, as shown in the drawing.

The spiral wire-rack may be readily applied to funnels having diierentheight, slope of sides, `greater or less length of neck, &c., the spiralpart adjusting itself readily to any funnel, keeping the paper entirelyclear of the funnel, which is not the case in the upright wire-racks, inwhich the plaited filter paper slips through the spaces of the rack andbears against the sides of funnel, preventing thereby the passage of airand hindering filtration.

The attachment of the rack to the top and bottom of funnel admits themore convenient handling of the funnel for pouring out part of theliquid or removing the same. may also be left in the funnel while usingthe same for other purposes. The spiral Wire rack takes vup but littleroom when not in use, as it assumes a flat shape, so as to be readilyshipped. The rack, being made of two pieces, offers no projecting partsfor the settling of impurities, so as to be kept clean with greatfacility. The spiral .rack extends around the filtering paper, preventsits contact W-ith the funnel, so as to accelerate the filtering process,and is attached to the funnel in a sufied.

2. A filter-rack, made of a spirally-coiled Wire, having outer hooks,and of a jointed center link with lower hook end, substantially asherein shown and described.

BYRON FENNER.

Witnesses JEROME LA DUE, IcHABoD THAYEE.

The rack

